Harquahala 2 — Plant Summary
- EIA Plant ID
- 67474
- Capacity
- 600 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries, Solar Photovoltaic
- Status
- Operating
- Location
- Maricopa, AZ
- Operating Since
- 2025
- Generators
- 2
- Operator
- Copia Power
- Parent Company
- —
- Annual Generation
- 647,592.49 MWh
- Capacity Factor
- 16.3%
- Balancing Authority
- Arizona Public Service Company
- ISO/RTO
- —
- NERC Region
- WECC
Harquahala 2
OperatingBESSSolarHybrid
Ranked #8 of 55 BESS plants in AZ#38 of 837 nationally
600 MW Batteries (300 MW) + Solar Photovoltaic (300 MW) operating in Maricopa, AZ — Arizona Public Service Company
EIAGEM
600 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2025
Operating Since
Location
Coordinates
33.4600, -113.1100
County
Maricopa, AZ
Nearby Plants
- Harquahala Generating ProjectNatural Gas1277.1 MW · 1.8 km
- Harquahala Sun Solar ProjectSolar150 MW · 3.2 km
- Desert Sand BESSBESS600 MW · 6.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Copia Power | — | — |
| Owner(s) | Copia Power | — | — |
| Status | Operating | operating | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Harquahala 2 is a 600 MW hybrid power plant located in Maricopa County, Arizona. The facility, which began operating in 2025, combines solar photovoltaic generation with battery energy storage. It is owned and operated by Copia Power. The plant utilizes fixed-tilt solar tracking and its battery energy storage system (BESS) has a duration of 4 hours. Harquahala 2 ranks as the 13th largest power plant in Arizona out of 47, and 48th nationally out of 514.
The plant's primary fuel source is listed as MWH, reflecting its reliance on solar energy. In its latest year of operation, Harquahala 2 generated 647,592 MWh of electricity, achieving a capacity factor of 16.3%. The plant consists of 2 generators and operates within the Arizona Public Service Company balancing authority, under the Western Electricity Coordinating Council (WECC) NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Arizona Public Service Company
Grid Voltage
250 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
43.4K MWh
Net Discharge
647.6K MWh
Annual Net Energy
16.3%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Grid·capacity addition
Solar is 77.7% of new capacity added to U.S. grid in 2025
Solar reached 11% of U.S. electric generation capacity, said data through April from the Federal Energy Regulatory Commission.
Federal Energy Regulatory Commission (regulator)
pv magazine USA·8 months ago
Deals·ppa
Copia Power and Arizona Public Service (APS) Enter Into 20-Year Power Purchase Agreements for Large-Scale Solar and Storage Energy Campus
PHOENIX, ARIZONA / ACCESS Newswire / January 17, 2025 /Copia Power ("Copia") today announced the execution of two Power Purchase Agreements...
Copia Power (seller)Arizona Public Service (buyer)
Yahoo Finance·1 years ago
Industry·technology
U of A to lead $12M study on underground carbon storage in Arizona
The University of Arizona is leading a $12 million feasibility study to explore carbon dioxide storage in the deep subsurface of the Harquahala basin.
University of Arizona (other)
University of Arizona News·1 years ago
Deals·project finance
Harquahala Valley to Host $1.2 Billion Solar Project Near Phoenix,
Utah's Copia Power is building a $1.2 billion solar project in Arizona's Harquahala Valley, promising renewable energy and job growth.
Copia Power (developer)
Hoodline·1 years ago
Last updated 2026-03-14
View all 10 articles